Table of Contents
Advertisement
Installer's Guide
BASePAn
2
TAB reMOvAL
(INFORMATION APPLICABLE TO ALL UNITS:)
1. When removing unit from the pallet, notice the tabs on the
basepan. Remove tabs by cutting with a sharp tool as shown in
Figure 2 and slide unit off of pallet.
2. The unit should be set on a level support pad at least as large
as the unit base pan, such as a concrete slab. If this is not
the application used please refer to Application Guide SSC-
APG008-EN.
3. The support pad must NOT be in direct contact with any struc-
ture. Unit must be positioned a minimum of 12" from any wall
or surrounding shrubbery to insure adequate airflow. Clearance
must be provided in front of control box (access panels) and any
other side requiring service access to meet National Electrical
Code. Also, the unit location must be far enough away from
any structure to prevent excess roof run-off water from pouring
directly on the unit. Do not locate unit(s) close to bedroom(s).
4. The top discharge area must be unrestricted for at least five (5)
feet above the unit. See Figure 1.
5. When the outdoor unit is mounted on a roof, be sure the roof
will support the unit's weight. Properly selected isolation is
recommended to prevent transmission to the building structure.
6. The maximum length of refrigerant lines from outdoor to
indoor unit should NOT exceed sixty (60) feet.
7. If outdoor unit is mounted above the air handler, maxi mum lift
should not exceed twenty-five (25) feet (suction line). If air han-
dler is mounted above condensing unit, maximum lift should
not exceed twenty-five (25) feet (liquid line).
8. Locate and install indoor coil or air handler in accordance with
instruction included with that unit.
C. InSTALLInG reFrIGerAnT LIneS
CAUTIOn
!
If using existing refrigerant lines make certain that all joints are
brazed, not soldered.
Condensing units have provisions for braze connections.
Pressure taps are provided on the service valves of outdoor unit for
compressor suction and liquid pressures.
The indoor end of the recommended refrigerant line sets may be
straight or with a ninety (90) degree bend, depending upon applica-
tion requirements. This should be thoroughly checked out before
ordering refrigerant line sets.
NOTE: The gas line must always be insulated.
The units are factory charged with the system charge required when
using fifteen (15) feet of rated connecting line. See unit nameplate.
CAUTIOn
!
HOT SUrFACe!
DO nOT TOUCH TOP OF COMPreSSOr.
May cause minor to severe burning.
Final refrigerant charge adjustment is necessary. Use Charge
Assist™ or the Manual Charging procedure found in the outdoor
unit Service Facts. Charge level can always be verified with the
Refrigerant Charging Chart found in the Service Facts.
1. Determine the most practical way to run the lines.
2. Consider types of bends to be made and space limitations.
© 2011 American Standard Heating & Air Conditioning
NOTE:
Large diameter tubing will be very difficult to rebend once it has
been shaped.
3. Determine the best starting point for routing the refrigerant
tubing — INSIDE OR OUTSIDE THE STRUCTURE.
4. Provide a pull-thru hole of sufficient size to allow both liquid
and gas lines.
5. Be sure the tubing is of sufficient length.
6. Uncoil the tubing — do not kink or dent.
7. Route the tubing making all required bends and properly
secure the tubing before making connections.
8. To prevent a noise within the building structure due to vibra-
tion transmission from the refrigerant lines, the following
precautions should be taken:
a. When the refrigerant lines have to be fastened to floor
joists or other framing in a structure, use isolation type
hangers.
b. Isolation hangers should also be used when refrigerant
lines are run in stud spaces or enclosed ceilings.
c. Where the refrigerant lines run through a wall or sill, they
should be insulated and isolated.
d. Isolate the lines from all ductwork.
D. ServICe vALve OPerATIOn
BrASS LIqUID LIne ServICe vALve
The Brass Liquid Line Service Valve is factory shipped in the
seated position to hold factory charge. The pressure tap service
port (when depressed) opens only to the field brazing side of the
valve when the valve is in the seated position. The liquid line valve
is not a back seating valve (see WARNING below).
WArnInG
!
extreme caution should be exercised when opening the Liquid
Line Service valve. Turn valve stem counterclockwise only until
the stem contacts the rolled edge. (See Figure 3). no torque is
required. Failure to follow this warning will result in abrupt re-
lease of system charge and may result in personal injury and/or
property damage.
BrASS GAS LIne BALL ServICe vALve
The Brass Gas Line Service Valve is shipped in the closed position
to hold the factory refrigerant charge. The pressure tap service
port (when depressed) opens only to the field brazing side when the
valve is in the closed position.
The Gas Line Ball Service Valve is full open with a 1/4 turn. See
Figure 4.
BrAzInG reFrIGerAnT LIneS
1. Remove lower access cover to access service valves.
2. Before brazing, remove plugs from external copper stub tubes.
Clean internal and external surfaces of stub tubes prior to
brazing.
3. Cut and fit tubing, minimizing the use of sharp 90° bends.
4. Insulate the entire gas line and its fittings.
5. Do NOT allow uninsulated liquid line to come in direct con-
tact with bare gas line.
LIqUID LIne ServICe vALve
3
11-BC11D1-9
Hide quick links:
Advertisement
Table of Contents
